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Valve and sensor function and operation
Valve operation
Outdoor unit - valve operation
Outdoor operation mode 20SF SV15 SV13 SV14 SV16 SV17 PMV2
Cooling operation Outdoor main heat OFF OFF ON OFF OFF ON -
exchanger
Sub heat exchanger ON ON ON OFF OFF ON -
Heating operation - ON OFF OFF ON OFF ON -
Simultaneous Outdoor main heat OFF OFF OFF OFF OFF ON Opening degree
cooling-dominant exchanger control
operation Sub heat exchanger ON ON OFF OFF OFF ON Opening degree
control
Simultaneous Expansion valve ON OFF OFF ON OFF ON -
heating-dominant Capillary ON OFF OFF OFF ON ON -
operation
Manual operation of valves
Note: 1. Ensure that the system is OFF before valves are manually operated.
2. Valves will reassume their required position unless electrically isolated.
a. Multi Controller
Display switch Valve Short point
position
0 PMV A TP 1 TP 2
1 PMV B Selected valve is fully opened for 2 Selected valve is fully closed for 2
2 PMV C minutes. minutes
3 PMV D
b. Outdoor unit
SW1 SW2 Short point Operation Function
0 N/A TP1 Valves will automatically assume PMV 1 fully open for 2 minutes.
1 their required position after 2 PMV 2 fully open for 2 minutes.
0 TP2 minutes. PMV 1 fully closed for 2 minutes.
1 PMV 2 fully closed for 2 minutes.
2 0 TP3 Push SW04 Solenoid valves manually energised
in sequence when pressed.
Press SW03 Solenoid valves automatically
energised in sequence
(1 second intervals)
Note:
During Manual/Automatic operation of outdoor valves, SV17 will not be energised. To confirm operation of SV17 operation is as follows: Energised valve
when compressor ON.
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